Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Fri Aug 14 11:22:59 2026 Auto Mode Machine = Linux oleg301-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg301-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 3788 11295 582535 555990 64 8 7358 7466 211232 207157 64 16 3871 32160 998622 998622 64 32 2359 54374 1562436 1385075 64 64 8023 62255 70868 801764 128 4 4089 6184 428193 549618 128 8 3321 15138 940549 809997 128 16 5163 49173 323259 549056 128 32 10791 39813 785122 216934 128 64 13727 39096 1579934 556454 128 128 7932 53357 847059 1755594 256 4 6992 5946 440634 608074 256 8 7492 16452 883152 203637 256 16 11162 15426 1169901 831194 256 32 10190 35256 330809 1108314 256 64 9237 27577 1479379 770920 256 128 9331 92120 1579483 1543163 256 256 28312 146870 617161 1375171 512 4 5925 5941 210273 572691 512 8 8026 7798 521385 474497 512 16 11748 19957 1113374 724081 512 32 18439 34927 922535 1071167 512 64 11000 22518 836636 1152822 512 128 20096 60064 512549 915847 512 256 36600 87208 765371 731480 512 512 43768 84404 1233614 2030130 1024 4 9854 7749 375342 376890 1024 8 7353 7948 822506 171238 1024 16 13229 10810 815943 421744 1024 32 11514 34578 1038483 119948 1024 64 27464 39472 783494 922497 1024 128 13383 52296 1528563 371414 1024 256 33627 118849 520551 1530197 1024 512 36983 47962 1738286 1675884 2048 4 6673 7734 230634 437217 2048 8 10913 17479 459925 341387 2048 16 12701 24224 653037 1079570 2048 32 18705 26829 1371798 1103423 2048 64 21224 39947 1500214 402361 2048 128 34418 56857 1557613 978039 2048 256 23585 62937 635453 1032220 2048 512 36637 99292 955200 868564 4096 4 6177 5818 169487 262581 4096 8 10564 9462 206231 280988 4096 16 15187 22401 470696 566043 4096 32 17226 25379 703291 650683 4096 64 34438 63123 533804 526008 4096 128 33266 53328 420706 793168 4096 256 43349 47678 737371 811258 4096 512 42503 46445 1309061 386413 8192 4 5773 5621 144732 344390 8192 8 11859 12509 639657 378503 8192 16 22234 22338 454657 533645 8192 32 23975 29548 669613 688629 8192 64 26593 33675 593280 777232 8192 128 40656 51923 451378 336191 8192 256 42062 49213 818307 908391 8192 512 31153 51614 1149931 1088925 16384 4 6109 6796 321481 402398 16384 8 10099 11506 309938 477683 16384 16 19781 21158 521404 419553 16384 32 23649 25686 721223 1003602 16384 64 28244 36773 1046025 584096 16384 128 38603 62364 426188 459204 16384 256 36890 52526 455745 827389 16384 512 37119 61338 977965 441713 32768 4 6451 6839 362361 256360 32768 8 9993 11445 415163 470717 32768 16 19288 21480 797256 610181 32768 32 27522 34808 573499 811568 32768 64 34344 40279 767670 567639 32768 128 39310 80216 641489 725839 32768 256